$ git clone -n https://src.fedoraproject.org/rpms/gnudos.git /var/lib/mock/f40-build-1999314-44329/root/chroot_tmpdir/scmroot/gnudos
Cloning into '/var/lib/mock/f40-build-1999314-44329/root/chroot_tmpdir/scmroot/gnudos'...
$ git fetch origin 6d8c93a1628aca6f9127781722afa61f9719c208:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnudos
 * [new ref]         6d8c93a1628aca6f9127781722afa61f9719c208 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d8c93a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild